[bergy]

The Tonawanda foundry cast big blocks on mold line 1 and small blocks on mold line 2. Line 1 produced about 30% fewer blocks than line 2. So that was the mix. All went next door to the Tonawanda motor plant. However, Tonawanda blocks (unmachined small blocks) were sent to Flint V8 for machining/assembly when Saginaw gray iron ran short of capacity - this was rare.